Hmm, which version of Grammer do you have (I ask because in the latest release, I cannot replicate this problem. Is it the version that takes arguments in the form of Note,Octave,Duration?). It does indeed work and I made an almost-music player with it. The size of the jack is 2.5mm, so some cellphone headphones will work. Otherwise, you will need to buy an adapter.

The man shuddered as the shadow drew a glistening sword from his back. Creeping closer and closer with his pale eyes burning into the man, the shadow slowly raised his blade and before he could thrust it down, the man heard the shadow hiss something.
"The Shadow Clan's presence must be like a whisper. Always felt, but never seen…"

By using a combo of BatLib and the startup app, I got some tokens that I definitely thought were impossible. One of them took up 3 or 4 lines. When you tried to run it, it gave an error, Version, and when put in quotes, it returned some part of the calculator memory, all in TI-BASIC. I've also discovered a few "?"s that have really odd properties such a printing the number 7 when using it with a Pause command, and the BASIC command parser actually accepting it as some sort of command that did apparently nothing. It's like the parser just skipped over the "?".

That is actually very interesting o.o If you an figure out which tokens they were, precisely, I would like to investigate them. They could have some use >.> (by using dim(6), you can get the hex code with BatLib)